<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" :inline="true" label-width="68px">
      <el-form-item label="课程名称" prop="title">
        <el-input
          v-model="queryParams.title"
          placeholder="请输入课程名称"
          clearable
          size="small"
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="success"
          icon="el-icon-edit"
          size="mini"
          :disabled="single"
          @click="handleUpdate"
        >修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="danger"
          icon="el-icon-delete"
          size="mini"
          :disabled="multiple"
          @click="handleDelete"
        >删除</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="warning"
          icon="el-icon-download"
          size="mini"
          @click="handleExport"
        >导出</el-button>
      </el-col>
    </el-row>

    <el-table v-loading="loading" :data="courseList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="课程名称" align="center" prop="title" />
      <el-table-column label="讲师" align="center" prop="editor" />
      <el-table-column :formatter="typeFormat" align="center" label="课程类型" prop="courseType" width="100"/>
      <el-table-column label="观看次数" align="center" prop="watchNum" />
      <el-table-column label="观看人数" align="center" prop="watchPeople" />
      <el-table-column align="center" label="上传时间" prop="createTime" width="180">
        <template slot-scope="scope">
          <span>{{ parseTime(scope.row.createTime, '{y}-{m}-{d}') }}</span>
        </template>
      </el-table-column>
      <el-table-column align="center" label="课程时长" prop="courseTime" />
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
          >删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total>0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />

    <!-- 添加或修改课程管理对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="800px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="课程名称" prop="title">
          <el-input v-model="form.title" placeholder="请输入课程名称" />
        </el-form-item>
        <el-form-item label="讲师" prop="editor">
          <el-input v-model="form.editor" placeholder="请输入讲师" />
        </el-form-item>
        <el-form-item label="课程类型" prop="courseType">
          <el-select placeholder="请选择" v-model="form.courseType">
            <el-option
              :key="dict.dictValue"
              :label="dict.dictLabel"
              :value="dict.dictValue"
              v-for="dict in typeOptions"
            ></el-option>
          </el-select>
        </el-form-item>
        <el-form-item label="来源" prop="source">
          <el-input v-model="form.source" placeholder="请输入来源" />
        </el-form-item>
        <el-form-item label="视频地址" prop="videoUrl">
          <el-input v-model="form.videoUrl" placeholder="请输入视频地址" />
<!--          <el-upload-->
<!--            class="avatar-uploader-video"-->
<!--            :action="action"-->
<!--            :show-file-list="false"-->
<!--            :on-progress="uploadVideoProcess"-->
<!--            :on-success="handleVideoSuccess"-->
<!--          >-->
<!--            <video v-if="form.videoUrl && !videoFlag"-->
<!--                   v-bind:src="form.videoUrl"-->
<!--                   class="avatar video-avatar"-->
<!--                   controls="controls">-->
<!--              您的浏览器不支持视频播放-->
<!--            </video>-->
<!--            <i v-else-if="form.videoUrl == '' && !videoFlag" class="el-icon-plus avatar-uploader-icon"></i>-->
<!--            <el-progress v-if="videoFlag == true"-->
<!--                         type="circle"-->
<!--                         v-bind:percentage="videoUploadPercent"-->
<!--                         style="margin-top:7px;"></el-progress>-->
<!--          </el-upload>-->
        </el-form-item>
        <el-form-item label="视频封面" prop="videoCover">
          <el-upload
            class="avatar-uploader"
            :action="action"
            :show-file-list="false"
            :on-success="uploadCoverSuccess"
          >
            <img v-if="form.videoCover" :src="form.videoCover" class="avatar">
            <i v-else class="el-icon-plus avatar-uploader-icon"></i>
          </el-upload>
        </el-form-item>
<!--        <el-form-item label="课程时长" prop="source">-->
<!--          <el-input placeholder="请输入课程时长" v-model="form.courseTime" />-->
<!--        </el-form-item>-->
        <el-form-item label="视频描述" prop="videoDesc">
          <Editor v-model="form.videoDesc"/>
        </el-form-item>
      </el-form>
      <div class="dialog-footer" slot="footer" style="padding-top:20px">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listCourse, getCourse, delCourse, addCourse, updateCourse, exportCourse } from "@/api/system/course";
import Editor from '@/components/Editor'
export default {
  name: "Course",
  components: {
    Editor
  },
  data() {
    return {
      // 视频上传
      videoFlag: false,
      //是否显示进度条
      videoUploadPercent: "",
      //进度条的进度，
      isShowUploadVideo: false,

      action:process.env.VUE_APP_BASE_API + '/system/upload/file',
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 总条数
      total: 0,
      // 课程管理表格数据
      courseList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      typeOptions: [],
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        title: undefined,
        editor: undefined,
        source: undefined,
        videoUrl: undefined,
        videoCover: undefined,
        videoDesc: undefined,
        courseTime: undefined,
        watchNum: undefined,
        digNum: undefined,
        watchPeople: undefined,
        seoTitle: undefined,
        seoKeyWord: undefined,
        seoDescribe: undefined,
        courseType: undefined,
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        title: [
          { required: true, message: "课程名称不能为空", trigger: "blur" }
        ],
        editor: [
          { required: true, message: "讲师不能为空", trigger: "blur" }
        ],
        source: [
          { required: true, message: "来源不能为空", trigger: "blur" }
        ],
        videoUrl: [
          { required: true, message: "视频地址不能为空", trigger: "blur" }
        ],
        videoCover: [
          { required: true, message: "视频封面不能为空", trigger: "blur" }
        ],
      }
    };
  },
  created() {
    this.getList();
    this.getDicts("sys_course_type").then(response => {
      this.typeOptions = response.data;
    });
  },
  methods: {
    typeFormat(row, column) {
      return this.selectDictLabel(this.typeOptions, row.courseType);
    },
    //进度条
    uploadVideoProcess(event, file, fileList) {
      this.videoFlag = true;
      this.videoUploadPercent = file.percentage.toFixed(0) * 1;
    },
    // 视频上传成功
    handleVideoSuccess(e, file) {
      this.isShowUploadVideo = true;
      this.videoFlag = false;
      this.videoUploadPercent = 0;
      console.log('upload video success',e)
      if(e.code === 200){
        this.form.videoUrl = e.data.path
      }
    },
    uploadCoverSuccess(e){
      console.log(e)
      if(e.code === 200){
        this.form.videoCover = e.data.path
      }
    },
    /** 查询课程管理列表 */
    getList() {
      this.loading = true;
      listCourse(this.queryParams).then(response => {
        this.courseList = response.rows;
        this.total = response.total;
        this.loading = false;
      });
    },
    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        id: undefined,
        title: undefined,
        editor: undefined,
        source: undefined,
        videoUrl: '',
        videoCover: undefined,
        videoDesc: undefined,
        courseTime: undefined,
        createTime: undefined,
        watchNum: undefined,
        digNum: undefined,
        watchPeople: undefined,
        seoTitle: undefined,
        seoKeyWord: undefined,
        seoDescribe: undefined,
        delFlag: undefined,
        courseType: undefined
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1;
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm");
      this.handleQuery();
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.id)
      this.single = selection.length!=1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.reset();
      this.open = true;
      this.title = "添加课程管理";
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset();
      const id = row.id || this.ids
      getCourse(id).then(response => {
        this.form = response.data;
        this.open = true;
        this.title = "修改课程管理";
      });
    },
    /** 提交按钮 */
    submitForm: function() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.id != undefined) {
            updateCourse(this.form).then(response => {
              if (response.code === 200) {
                this.msgSuccess("修改成功");
                this.open = false;
                this.getList();
              }
            });
          } else {
            addCourse(this.form).then(response => {
              if (response.code === 200) {
                this.msgSuccess("新增成功");
                this.open = false;
                this.getList();
              }
            });
          }
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const ids = row.id || this.ids;
      this.$confirm('是否确认删除课程管理编号为"' + ids + '"的数据项?', "警告", {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }).then(function() {
          return delCourse(ids);
        }).then(() => {
          this.getList();
          this.msgSuccess("删除成功");
        }).catch(function() {});
    },
    /** 导出按钮操作 */
    handleExport() {
      const queryParams = this.queryParams;
      this.$confirm('是否确认导出所有课程管理数据项?', "警告", {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }).then(function() {
          return exportCourse(queryParams);
        }).then(response => {
          this.download(response.msg);
        }).catch(function() {});
    }
  }
};
</script>

<style>
  .avatar-uploader-video{
    width: 380px;
    height: 200px;
  }
  .avatar-uploader-video .el-upload,.avatar-uploader .el-upload {
    border: 1px dashed #d9d9d9;
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
  }
  .avatar-uploader .el-upload:hover {
    border-color: #409EFF;
  }
  .avatar-uploader-icon {
    font-size: 28px;
    color: #8c939d;
    width: 100px;
    height: 100px;
    line-height: 100px;
    text-align: center;
  }
  .avatar {
    width: 100px;
    height: 100px;
    display: block;
  }

  .video-avatar {
    width: 380px;
    height: 200px;
    display: block;
  }
</style>
